[sane-devel] PNM Driver problem scanimage (sane-backends) 1.0.22; backend version 1.0.22

[Alejandro Imass]

I think I solved it, and it has to do with the maxlen param on the
read(). If I use (0) it fails but if I use 32768 it works. On other
scanners the 0 is equivalent to the maxlength but in the PNM it seems
to need to be explicit.

-- 
Alejandro Imass

On Fri, Nov 2, 2012 at 3:01 PM, Alejandro Imass <aimass at p2ee.org> wrote:
> On Fri, Nov 2, 2012 at 1:04 PM, m. allan noah <kitno455 at gmail.com> wrote:
>> Can you try to get some debug logs of the backend, to compare the two programs?
>>
>> SANE_DEBUG_PNM=255 scanimage ... 2> scanimage.log
>> SANE_DEBUG_PNM=255 perlprog ... 2> perlprog.log
>>
>> Maybe the perl code needs an additional call somewhere, or maybe there
>> is a bug in the backend.
>>
>
> Here are the logs.
>
> It seems there is an additional call to sane_get_parameters after the
> sane_start in the scanimage case, and a couple of control options at
> the beginning, but appart from that there is not much difference. I am
> also attaching the Perl code to see if we are missing something here.
>
> Thanks!
>
> --
> Alejandro Imass